/* ============================================
   Garrison Pollard - Academic Personal Website
   Clean & Minimal Design
   ============================================ */

/* Reset & Base */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-text: #1a1a1a;
  --color-text-secondary: #555;
  --color-accent: #2c5f4a;
  --color-accent-light: #e8f0ec;
  --color-bg: #ffffff;
  --color-bg-alt: #fafafa;
  --color-border: #e5e5e5;
  --color-link: #2c5f4a;
  --color-link-hover: #1e4435;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Lora', 'Georgia', serif;
  --max-width: 780px;
  --nav-height: 64px;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.3;
}

h1 {
  font-size: 2.2rem;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

h2 {
  font-size: 1.5rem;
  color: var(--color-accent);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-accent-light);
}

h3 {
  font-size: 1.1rem;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 1rem;
  color: var(--color-text-secondary);
}

a {
  color: var(--color-link);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

a:hover {
  border-bottom-color: var(--color-link);
}

/* Navigation */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  padding: 0 2rem;
}

nav .nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
}

nav .site-name {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  border-bottom: none;
}

nav .site-name:hover {
  color: var(--color-accent);
  border-bottom: none;
}

nav .nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

nav .nav-links a {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  letter-spacing: 0.02em;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

nav .nav-links a:hover,
nav .nav-links a.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: 0.3s;
}

/* Main Content */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

/* Home Page - Hero */
.hero {
  display: flex;
  align-items: flex-start;
  gap: 3rem;
  margin-bottom: 2rem;
}

.hero-photo {
  flex-shrink: 0;
}

.hero-photo img {
  width: 220px;
  height: 280px;
  object-fit: cover;
  border-radius: 8px;
  filter: grayscale(0%);
}

.hero-info h1 {
  margin-bottom: 0.75rem;
}

.hero-info .tagline {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

.hero-info .details {
  font-size: 0.95rem;
}

.hero-info .details p {
  margin-bottom: 0.5rem;
}

.hero-info .details strong {
  color: var(--color-text);
}

/* Social Links */
.social-links {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-bottom: none;
  transition: background 0.2s ease, color 0.2s ease;
}

.social-links a:hover {
  background: var(--color-accent);
  color: white;
  border-bottom: none;
}

.social-links svg {
  width: 18px;
  height: 18px;
}

/* Section spacing */
.section {
  margin-bottom: 3rem;
}

/* Recent Updates */
.updates-list {
  list-style: none;
  padding: 0;
}

.updates-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
  line-height: 1.6;
}

.updates-list li:last-child {
  border-bottom: none;
}

/* Research Papers */
.paper {
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
}

.paper:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.paper-title {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.35rem;
}

.paper-coauthors {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.35rem;
}

.paper-status {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--color-accent);
  background: var(--color-accent-light);
  padding: 0.15rem 0.6rem;
  border-radius: 3px;
  margin-bottom: 0.6rem;
}

.paper-links {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.6rem;
  flex-wrap: wrap;
}

.paper-links a {
  font-size: 0.85rem;
  color: var(--color-accent);
  border-bottom: 1px dashed var(--color-accent);
}

.paper-links span.placeholder {
  font-size: 0.85rem;
  color: #aaa;
}

.paper-abstract {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-top: 0.5rem;
}

.paper-abstract summary {
  cursor: pointer;
  color: var(--color-accent);
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

.paper-abstract summary:hover {
  text-decoration: underline;
}

.paper-presentations {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: 0.5rem;
  font-style: italic;
}

/* Teaching */
.course {
  margin-bottom: 2rem;
  padding: 1.25rem 1.5rem;
  background: var(--color-bg-alt);
  border-radius: 6px;
  border-left: 3px solid var(--color-accent);
}

.course-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.course-links {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}

.course-links a,
.course-links span.placeholder {
  font-size: 0.85rem;
}

.course-links span.placeholder {
  color: #aaa;
}

.course-semesters {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-top: 0.5rem;
}

.course-semesters li {
  list-style: none;
  padding: 0.2rem 0;
}

.testimonial {
  margin-top: 2rem;
  padding: 1.25rem 1.5rem;
  border-left: 3px solid var(--color-accent-light);
  background: var(--color-bg-alt);
  border-radius: 0 6px 6px 0;
}

.testimonial blockquote {
  font-style: italic;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-bottom: 0.5rem;
}

.testimonial cite {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  font-style: normal;
}

/* Resource links */
.resource-group {
  margin-bottom: 2rem;
}

.resource-list {
  list-style: none;
}

.resource-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border);
}

.resource-list li:last-child {
  border-bottom: none;
}

.resource-list a {
  font-size: 0.95rem;
}

/* Footer */
footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

footer .quote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.35rem;
}

footer .quote-author {
  font-size: 0.85rem;
  color: var(--color-accent);
}

footer .copyright {
  margin-top: 1.5rem;
  font-size: 0.8rem;
  color: #aaa;
}

/* Upcoming note */
.upcoming-note {
  font-size: 0.95rem;
  color: var(--color-accent);
  background: var(--color-accent-light);
  padding: 0.75rem 1rem;
  border-radius: 6px;
  margin-bottom: 2rem;
}

/* Responsive */
@media (max-width: 680px) {
  nav {
    padding: 0 1rem;
  }

  nav .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    padding: 1rem 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  }

  nav .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .hero {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .hero-photo img {
    width: 180px;
    height: 230px;
  }

  .social-links {
    justify-content: center;
  }

  h1 {
    font-size: 1.8rem;
  }

  main {
    padding: 2rem 1rem 3rem;
  }
}